Florida Woman Killed In London Knife Attack

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LONDON (CBSMiami) – Police in London have identified the American woman killed in a stabbing attack as 64-year-old Darlene Horton. She was married to a psychology professor from Florida State University in Tallahassee.

Richard Wagner and his wife Darlene were in London while he taught summer classes there.

"There are no words to express our heartache over this terrible tragedy," Florida State University president John Thrasher said in a statement. "We are shocked that such senseless violence has touched our own FSU family."

Five other people were wounded in the knife rampage, including another American.

"I could just see, they were applying some sort of CPR to the person who was lying on the ground," described witness Rehena Azam.

Police have not released the name of the suspect but say he's a Norwegian citizen of Somali descent. Police officers used a stun gun to subdue the 19-year-old suspect at the scene of the stabbings late Wednesday.

Investigators have interrogated him and interviewed his family.  They believe he was mentally ill and not carrying out a terror attack.

"I emphasize that so far we have found no evidence of radicalization that would suggest that the man in our custody is in anyway motivated by terrorism," said Mark Rowley, Assistant Police Commissioner.

"We believe this was a spontaneous attack and the victims were selected at random," Rowley said.

The attack happened in London's popular Russell Square, which is close to landmarks including the British Museum and is usually filled with tourists and students.

The violence comes within hours of London police announcing a plan to put an additional 600 armed officers on patrol.  Typically police in the U-K do not carry guns.

British authorities are urging the public to be vigilant following Islamic State terror attacks across Europe.